高硅铝合金的固体铁粉雾化

Fabrication of High Silicon Aluminum Alloy Powders by Solid Medium Atomization Process

固体雾化是在普通气体雾化基础上改变了雾化介质而发展起来的一种新型的雾化制粉方法.这种方法采用含有固体介质颗粒的高速固气两相流对熔融金属或合金进行雾化,从而得到粉末.与普通气体雾化相比,雾化介质的能量利用率得到了很大的提高.本文采用了可通过磁选而除去的铁粉作为固体颗粒对高硅铝合金进行了固体雾化制粉研究,结果表明:在雾化工艺参数均保持相同的情况下,固体雾化制得粉末的粒度更细,冷速更高.

A novel solid atomization technology is developed with a highvelocity gas jet stream containing solid particles as the atomization medium. The energy of the medium can be efficiently used in this technology. The iron powders, which can be easily removed by magnetic separation, are chosen as atomization medium to atomize high silicon Al alloy. The experimental result shows that in contrast to conventional gas atomization, the finer powder with high cooling rate can be obtained by the new developed technology under the same process parameter condition, and the fine powder yield is evaluated. 